Thigrnonasty (thigmotropism)
refers to plant movement in response to touch or
physical contact without regard to the direction
of the stimulus. Thigmonastic movements are
exemplified by the closing of the insect-eating
plant Venus's flytrap (Dionaea muscipula) and
the bending of the glandular hairs of sun-dew
(Drosera sp.) as a result of contact with an insect.